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Have a question about CadSoft EAGLE?  Ask our Expert, Richard! (Archive)

nlarson

This thread is now locked - but you can still ask Richard by posting your questions here.  If you'd rather browse other member's questions you can read the CadSoft EAGLE Forums for past questions and answers. Enjoy!

 

Browse past Q&A help on anything technical relating to CadSoft EAGLE!


image

 

Richard Hammerl

Richard is an engineer with 16 years experience in EAGLE customer support and is waiting for your questions.

  • in reply to DSFe

    Hi Daniel,

     

    as far as I know no such package is currently available in our libraries. So you have to create it by yourself. Place 8 SMD pads and draw a polygon or place the large SMD so that it covers the drain contacts. Using a polygon will cause DRC errors in the layout. The reason is that you can't name the polygon in the package editor and assign it to a certain signal. This is not a problem at all, you can approve these error messages.

     

    In case you use a SMD for the big area, you should place an additional pin in the symbol. You won't have DRC errors in the layout then.

     

    Hope this helps.

    Regards,

    Richard

  • Hey Richard,

     

    I was wondering if it is possible to add a graphics image to the Schematic section of my circuit?

     

    What I am wanting to do is add a captured image from my O-Scope to the schematics to show what the circuit is doing.

    How would I do this?

     

    Is this possible or is it going to be easier to export the schematic to pdf format and then go through and edit the pdf and add them there?

     

    Thank you for your time.

  • Dear Richard,
     
    I’m trying to use FDMS86101FDMS86101 ( farnell code 1885754 ) and I’m having difficulties drawing the component Pad.
     
    Do you know if there is already the component available in a library?
     
    In the library I’ve created the different areas with gave me errors in  the eagles DRC and more important don’t able me to generate thermal pad around. Please see attached picture. Do you have a solution for this?
     
    Danielimage
  • in reply to e14 Contributor

    Hello,

     

    a thermal symbol looks like shown in the attached image.

    Concerning Gerber data and CAM Processor: The inner layer has to be combined with pads and vias in order to get proper Gerber data. it is treated like Top or Bottom.

    image

    Regards,

    Richard

  • in reply to e14 Contributor

    Sir,

     

    I found out the option under 'change--> thermals--> ON'. Using this option i can see the ring formation of the filling around the respective signal vias. Are these the thermals?

     

    And when I'll be using the CAM Processor, doi have to select the pads and vias like how we do for the top and bottom layer or do i have to just select the signal layer as in case of the sagnal layer with a $ sign?

  • in reply to Richard_H

    Hello Sir,

     

    It wa so kind of you to answer my query so quickly.

     

    Sir, I did try out the polygon method. It does work but the main point is that it does not show thermal vias for any signal, may it be GND or VCC or 5V or any other.

     

    My other colleages have designed a similar 4 layered board using PADS software. And the gerber viewer (we are using Gerbv) shows thermal pads for all the different types of grounds and powers that they have used, but it is not the case with Eagle..Please help me with this problem of mine..

  • in reply to e14 Contributor

    Hello,

     

    to realize three different GND signals within one layer, you have to use polygons in one of the inner signal layers. Please don't use a Supply layer (which has the a $ character at the beginning) because such a supply layer is displayed and plotted inverted and leads exactly one signal. The signal you specify with the supply layer's name.

     

    So what you have to do is to use an inner layer and draw three different POLYGONs. Name the polygons the same as the signal they should belong to. And think about the polygon property "Rank" which determines the priority of the polygon.  Additional help can be found in our FAQ:

    http://www.cadsoftusa.com/training/faq/#17

     

    Regards,

    Richard

  • Hello Sir,

    I am designing a 4 layered board in Eagle. My ground layer has 3 types of grounds namely GND,AGND,GND, which are supposed to be in the same layer GND.

    one  of my signal layer is $GND and so only my GND shows thermal vias on  that layer while other (AGND,GND1) show isolated rings...plz help me  with this poblem..

  • in reply to e14 Contributor

    Hi,

     

    no I am sorry. EAGLE has no possibilities that allow setting a password to a file.

     

    Regards,

    Richard

  • in reply to jpmerron

    Hi John,

     

    after specifying a netclass you have to assign the netclass to a net. This can be done for example via the properties dialog of a net. You can also use CHANGE CLASS and click onto the net you want to assign.

     

    Regards,

    Richard